FILE - DECEMBER 26: Former U.S. President George H.W. Bush has been in and out of the hospital in Houston since early November his spokesman said on December 26, 2012, and spent Christmas in the hospital with a rising fever.  HOUSTON, TX - MARCH 29:   Former President George H.W. Bush talks with Republican presidential candidate, former Massachusetts Gov. Mitt Romney at Bush's office on March 29, 2012 in Houston, Texas. Mitt Romney received an endorsement from Former President George H.W. Bush and Barbara Bush during the meeting. Photo: Tom Pennington, Getty Images / 2012 Getty Images